Engine valve



June 28, 1927.

- A. E. COLCHESTER ENGINE VALVE Filed. Nov. 13; 1925 M m m 4 I ATTORNEYS Patented June 28, 1927.

untrue ARTHUR E. COLGHESTEB,'OF DORCHESTER, MASSACHUSETTS.

ENGINE VALVE.

Application filed November This invention relates to internal combustion engines, and is'more particularly die rected to valve for controlling the admission of the fuel and the discharge of the eX- haust.

An object of the invention is the provision of a valve which is noiseless in opera tion. and which will eliminate tappets and springs. increase the efficiency of the engine by a reduction in the work required to actuate the usual tappets. and eliminate the necessity of IGQI'lIlCllIlQ'.

Another object of the invention is the provision of a valve in the form of a piston for timing the admission of fuel and operating in conjunction with a sliding sleeve to permit the exhaust of the burnt gases.

A further object of the invention is the provision of a valve for an internal combustion engine inthe' form of a reciprocating piston which cooperates with a stationary sleeve to admit fuel'to the combustion chamber of the engine while a reciprocating! sleeve cooperates with the stationary sleeve to permit the exhaust gases to discharge around the stationary sleeve in timed relation with the movement of the power piston of the en gins.

A' still further object of the invention is the provision of a valve for controlling the admission of the fuel and the discharge of the exhaust gases and in which the fresh charge of fuel is not onlv warmed before admission to the engine cylinder but in conjunction with an embracing water jacket aids in cooling the valve.

This invention will be best understood from a consideration of the following detailed description in view of the accompanyinsz drawing forming a part of the specification: nevertheless it is to be understood that the invention is not confine-d to the disclosure. being susceptible of such changes and modifications which shall define no material departure from the salient features of the invention as expressed in the appended claims.

Fig. 1 is a vertical. section of an engine and a valve constructed according to the principles of my invention.

Fig. 2 is a horizontal section taken along the line 2-2 of Fig. 1.

13, 1925. Serial No. 68,860. 3

Referring more particularly to the drawinns 10 designates a cylinder of an internal combustion engine which-is'embraced by a water jacket 11. The cylinder has an apron 12 depending? into a crank case 13 and supported on said case by an annular flange 14.

A passage 15 for the admission of fuel and the d scharge of the exhaust gases is provided at the top of the: cylinder and at one side of the same. the water jacket embracing such passage. The passage 15 opens directly into a combustion chamber Iii-above a reciprocating power piston 17.

The piston 17 is connected to a crank shaft 18 by a rod 19.. Said shaft is mounted in the usual bearing and disposed in the crank case 13. Agear 20 on the shaft 18 drives a gear 21 on a counter shaft 22 which in turn meshes with a gear 23. is rigid with a timing shaft 24 on which are mounted cranks 25 and 26. a

A valve casing 27 is cast integrally with the cylinder and at point on the cylinder which is adjacent thepassagelii. An extension, of the water jacket embraces the casing for maintaining said casing cool. The casin! has an exhaust port 29 which is-connected by a passage 30to an exhaust manifold 31. A plate 32 formingr the bottom of the casing has a central opening 33 through which is reciprocated a, hollow rod 34. A tubular guide 35 for the rod depends from and is integrally cast with said plate. An intake pipe 36 has a flange 37 secured in any approved manner to the cylinder head 10 and to theupper edge of the casing and forms the top of the valve casing 27. A stationary sleeve 38 is mounted in the casino: 27 and has a shoulder 39fitted in an annular recess in the upper end of the casing so that when the flange 37, is secured in place the sleeve is likewise held rigidly. A rib 40 formed at the upper end of the sleeve provides for-an annular space 41 between the lower end of said sleeve and thevalve casing and in which space a sliding sleeve 42 recip rocates. The sleeve 38 terminates short of the bottom of the casing 27 so that the lower end of said sleeve will not interfere with the reciprocation of sleeve 42 and sufficient space will be maintained between the lower end of sleeve 38 and the bottom 43 of the Gear 23 sliding sleeve valve 42. The valve l2 controls the exhaust port 29 which is closed when said valve covers said port and the upper edge l i of the valve reaches a point adjacent the lower annular edge of: the rib 40. The rod 34: has a threaded connection with an internal threaded boss. The rod 34 is connected by means of a link is to the crank 25.

A link 4-7 connects a rod 48 to the crank 26. Rod 48 is reciprocated in the hollow rods 35 which acts as a guide for rod' 48. It will be noticed that cranks 25 and 26 are set 180 apart so that valve 42' is moved upwardly while a piston valve 49 which is connected to rod l8 is simultaneously moved downwardly. Links 46 and 47 are operated through a passage 53 in the crank case 13; Piston valve 4C9 controls two pairs of diametrically disposed ports 50 formed in the stationary sleeve 38', the ports being in horizontal alinement with the passage 15' so that when valve 49 is loweredsufii'ciently in the sleeve 38 it will uncover the ports and places the intake 36 in communication with the passage 15 and the combustion chamber 16. it will be noted that the annular space 41 between the sleeve 38 and annex wall of the casing 27 places'the passage 15 and the exhaust port 29 in communication.

A spark plug 51 is mounted in the usual threaded opening'52 in the cylinder head 10 and is adapted to be placed in curcuit with the usual ignition system. The intake 36 is either supplied with gas or a combustible mixture from the usual ca-rbureter.

The operation of my device is as follows :The crank shaft 18 is revolved by the piston 17 which tl'irouglr gear rotates gears 21 and 23 at a speed which is half the speed of'rotation of shaft 18 since the diameter of gear 20 is half the diameter of either gear 21 or 23". Thus piston 17 has two upstr'okes and two down strokes to' one up and down stroke of either of the valves -12 49.

Upon the intake stroke of piston 17 valve 49 moves downwardly uncovering ports50' in the stationary sleeve 38 whence fuel is drawn intothe combustion chamber from the intake 36. Valve 4l9then moves up wardly and closes the intake ports 50 simultaneously. Valve 42' moves upwardly and closes intake ports 50; having previously closed exhaust port 29". At the time that .such ports are closed piston 17 moves upwardly on its compression stroke. At or near the endiof the compression stroke the compressed charge is tired by the spark plug 51 when piston 17 and valve 42 move downwardly while valve 49 moves upwardly. Valve 42' at the end of the expansion stroke uncovers the exhaust port 29 and the engine exhaust on the upstroke of piston 17. At this time valve 49 maintains the ports 50 closed until the beginning of the intake stroke when the cycles just described are repeated.

I claim 1. In an internal combustion engine, the combination of a cylinder having a port, a valve casing connected with the cylinder, a stationary sleeve in the- *asing spaced from the casing to provide an annular passage, said? sleeve having ports connecting the interior of the sleeve with said passage, an exhaust port in: the casing in communication with the passage, a sleeve slidably mounted between the stationary sleeve and the casing and adapted to cover the ports in the casing, cylinder, and stationary sleeve a piston valve slidably mounted in the stationary sleeve and adapted to control the ports in said sleeve, means for reciprocating the slidabl'e sleeve and piston valve and an intake pipe connected with thecasing above the stationary sleeve, so that when the piston valve is moved to the oppositeend' of the sleeve, said valve will aid in drawing in a fuel charge into the sleeve, in advance of the opening of the ports in said sleeve by the piston valve.

2. In an internal combustion engine, the combination of a cylinder having a port, a valve casing connected with the cyiin'd'er, a stationary sleeve in the casing spaced from the casing to provide an annular passage, a rib on the sleeve for spacing the sleeve from the casing, said sleeve having ports connecting the interior of the sleeve with said pas sage, an exhaust port in the casing in communication with the passage, said rib terminating above the ports in the cylinder and easing, a sleeve slidably mounted between the stationary sleeve and the casing and adapted to cover the ports in the casing, cylinder, and stationary sleeve a piston valve slida'bl'y mounted in the stationary sleeve and adapted to control the ports in said sleeve, means for reciprocating the slida'ble sleeve and piston valve and an intake pipe connected with the casing above the stationary sleeve, so that when the piston valve is moved to the opposite end of thesleeve, said valve will aid? in drawing in a fuel charge into the sleeve, in advance of the opening of the ports in said sleeve by the piston valve.

3.. In an internal combustion engine, the combination of a cylinder having a port, a valve casing connected with the cylinder, a stationary sleeve in the casing spaced from the casing to provide an annular passage, said sleeve having ports connecting the interiorof. the sleeve with said passage, an exhaust port in the casing in communication witlr the passage, a sleeve slidably mounted between the stationary sleeve and the casing and adapted to cover the ports in the casing, cylinder, and stationary sleeve a piston valve slidably mounted in the stationary IUU sleeve and adapted to control the ports in said sleeve, means for reciprocating the slidable sleeve and piston valve and an intake pipe connected with the casing above the stationary sleeve, so that when the piston valve is moved to the opposite endof the sleeve, said valve will aid in drawing in a fuel charge into the sleeve, in advance of the opening of the ports in saidsleeve by the piston valve, said slidable sleeve and piston valve being moved in opposite directions, the slidable sleeve being adapted to fill the annular passage when moved towards the intake pipe.

l. In an internal combustion engine, the combination of a cylinder having a port, a valve casing connected with the cylinder, a stationary sleeve in the casing spaced from the casing to provide an annular passage, said sleeve having ports connecting the in- -terior of the sleeve with said passage, an eX- haust port in the casing in communication with the passage, a sleeve slidably mounted between the stationary sleeve and the casing and adapted to cover the ports in the casing, cylinder, and stationary sleeve a piston valve slidably mounted in the stationary sleeve and adapted to control the ports in said sleeve, means for reciprocating the slidable sleeve and piston valve and an intakepipe connected with the casing above the stationary sleeve the piston valve being adapted to uncover the ports in the stationary sleeve to the annular passage when an end of said valve passes said ports and before the slidable sleeve covers said ports,

so that when the plston valve is moved to the opposite end of the sleeve, said valve will aid in drawing in a fuel charge into the sleeve in advance of the opening of the ports in said sleeve by the piston valve.

5. In an internal combustion engine, the combination of a cylinder having a port, a valve casing connected with the cylinder, a stationary sleeve in the casing spaced from the casing to provide an annular passa e, a rib on the sleeve for spacing the sleeve rom the casing said sleeve having ports connecting theinterior of the sleeve with said passage, an exhaustport in the casing in communication with the passage, said rib terminating above theports in the cylinder and casing, a sleeve slidably mounted between the stationary sleeve and the casing and adapted to cover the ports in the casing, cylinder, and stationary sleeve a piston valve slidably mountedrin the stationary sleeve and adapted to control the ports in said sleeve, means for reciprocating the slidable sleeve and piston valve and an intake pipe connected with the casing above the stationary sleeve, so that when the piston valve is moved to the opposite end of the sleeve, said valve will aid in drawing in a fuel charge into the sleeve, in advance of the opening of the ports insaid sleeve by the piston valve, said reciprocating means being adapted to move the piston valve and slidable sleeve simultaneously in opposite directions, one end of the slidable sleeve being moved in cooperative relationship with the rib to close the annular passage.

ARTHUR E. COLCHESTER. 

